Electric-lighting fixture.



G. A. BOOMER.

ELECTRIC LIGHTING FIXTURE. APPLICATION man NOV. 22. 1911.

Patented Apr. 2, 1918.

2 SHEETS-SHEET l.

G. A. BOOMER. ELECTRIC LIGHTING FIXTURE.

APPLICATION FILED NOV- 22, I917.

Patented Apr. 2, 1918. I 2 SHEETS-SHEET 2 i srrs TNT onrrcn.

GEORGE A. BOOMER, OF WATERBURY, CONNECTICUT, ASSIGNOR TO THE PLUME & ATWOOD MFG. 00., OF WATERBURY, CONNECTICUT, A CORPORATION.

ELECTRIC-LIGHTING FIXTURE.

Application filed November 22, 181.7.

To all whom it may concern:

Be it known that I, GEORGE A. BOOMER, a citizen of the United States, residing at Waterbury, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Electric- Lighting Fixtures; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in-

Figure 1 a View in side elevation of an electric lighting fixture embodying my invention, shown with the shell-member drawn outward as required for the inspection of the wiring.

Fig. 2 a View thereof partly in elevation and partly in vertical section, with the shellmember in its installed position.

Fig. 3 a view in vertical section on the line 33 of Fig. 2.

My invention relates to an improvement in electric lighting fixtures, the object being to produce at a low cost for manufacture, a simple and attractive fixture constructed with particular reference to ease of installation, and convenience of inspection.

With these ends in view, my invention consists in an electric lighting fixture having certain details of construction as will be hereinafter described and pointed out in the claims.

In carrying out my invention, as herein shown, I employ a shell 2 having its outer end formed with an inwardly turned, concentric, internally threaded flange 3 for the reception of an externally threaded concentric mounting-shoulder 4 formed integral with the inner end of the tubular casing 5. The said flange 3 and shoulder 1 are enough larger in diameter than the casing 5 to permit the shell 2 to be tilted, as shown in Fig. 1, when drawn outward, for the inspection of the wires 6 within the feet of the tripod or crowfoot 7 which is secured by screws 8 to the wall 9, and which receives the threaded inner end of the iron pipe or conduit 10 provided for the wires which lead to the socket 11 of the lamp 12. The outer end of the said pipe 10 is threaded for the application to it of an end-body or conjunctionv Specification of Letters Patent.

Patented Apr. 2, 1918.

Serial No. 203,458.

member comprising a substantially spherical shell 13 spiled and tapped as at 1 1 for the reception of a threaded nipple 15 to the projecting outer end of which the lamp-socket 11 is screwed. The said shell 13 is also formed with an annular bead 16 the opening 17 of which adapts the bead to be slipped over the outer end of the casing 5 which incloses the iron pipe or conduit 10. Vithin the bead 1G, I locate a seat 18 centrally spiled and tapped as at 19 to adapt the endbody to be screwed upon the threaded outer end of the pipe 10. The outer edge of the seat 18 is turned outward with respect to the end-body and shaped in cross-section to fit within the bead 16 by which the seat is secured in place and also against rotation. The seat 18 comes to a bearing at the point 20, upon the outer end of the casing 5.

In installing my improved fixture, the tripod or crowfoot 7 is first attached by the screws 8 to the wall 9. The Wires 6 having been threaded through the pipe 10, the inner end of the same is screwed firmly into the tripod. The shell 2 and easing 5 are then slipped over the pipe 10 after which the end-body is screwed upon the projecting end of the pipe. The shell 2 and easing 5 are now turned with respect to each other, either or both, until the inner end of the shell has been forced into its installed position against the wall 9 and the outer end of the casing 5 has been seated upon the seat 18 at the point 20. When it is desired to inspect the wires 6, all that it is necessary to do is to rotate the shell 2 sufliciently to disengage it from the threads of the mounting-shoulder 4 after which it is drawn outward and allowed to tilt into its inspecting or clearance position, as shown in Fig. 1, the amount of tilt being dependent upon the difference between the diameter of the mounting-shoulder at and the casing 5, or, in other words, upon the difference between the diameter of the threaded opening of the flange 3, and the diameter of the casing 5.

By means of my improved construction, I am able to dispense with screwing or otherwise fastening the shell 2 to the wall, and from making the casing 5 to extend inward from the end-body to the tripod or crowfoot 7, which is the ordinary practice.

My invention is equally applicable to ceiling fixtures without change of construction other than that the nipple or nipples in the end-body w1ll be arranged with reference to overhead lighting. In the case of a ceiling outer end with a threaded concentric opening, of a casing formed at its inner end with threads for being screwed into the said opening, an end-body, and a pipe or conduit passthrough the said shell and casing and adapted at its inner end to be secured in place and to have the said end-body applied to its outer end, whereby the said shell. or canopy held in its installed position by the said casing, pipe and 611(l-lJOC 2. In an electric lighting fixture, the coinbinaticn with a shell or canopy-formed at its outer end with an internally threaded concentric opening, of a casing formed at its inner end with a concentric externally threaded mounting-shoulder larger in diameter than the diameter of the casing to pen niit the shell to be tilted with respect to the casing when drawn over the same.

3. In an electric lighting fixture, the cornbination with a shell provided at its outer end with an externally threaded concentric opening, of a tubular easing provided at its inner end with an integral externally threaded mounting-shoulder larger in diameter than the diameter of the casing to permit the shell to be tilted with respect to the casing when drawn over the same, a pipe or conduit, means for supporting the same at its inner end, and an end-hody adapted to be applied to the outer end of the said pipe or conduit and to engage with the outer end of the said casing, whereby the said shell or canopy is held in its installed position.

In testimony whereof, l have signed this specification in the presence of two subscribing witnesses.

GEORGE A. BOOMER.

Witnesses:

F. G. Evnnsnn, l). A. WILLIAMS.

Copies of this patent may be obtained for five cents each, by addressing" the Commissioner of Patents, Washington, D. C. 

